Vacuum cleaner motor



July 18, 1933.-

c. GHLBERT 1,918,695

VACUUM 'CLEANER MOTOR Filed Feb- 7, 1931 2 Shets-Sheet 1 wot/M133 July 18, 1933. V A, GlLBERT 1,918,395

VACUUM CLEANER MOTOR Filed Feb 7, 195]. 2 Sheets-Sheet 2 gwvamioa C'ril "wzx Patented July 18, 1933 UNITED STATES PATENT OFF-ICE ALFREDO. GILBERT, OF NORTH HAVEN, CONNECTICUT, ASSIGNOR TO THE A. C. GILBERT COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF MARYLAND VACUUM CLEANER MOTOR Application filed rebruar 'z, 1931. Serial No. 514,118.

This invention relates to im rovements in motors for vacuum cleaners o the portable type and more particularly to motors for vacuum cleaners of the typeand form shown and described in my co-pending application,

Serial No. 290,498, filed July 5, 1928, pat-.

ented November 17, 1931, No. 1,832,457, and of which this application is a continuation in part.

One of the objects of this invention is to improve the structure of vacuum cleaner motors by providing an improved motor frame and a fan and motor casing combination that is economical to manufacture and convenient to assemble and use.

Another object is to provide a motor frame for a vacuum cleaner motor having a simple but eflicient arrangement of parts and which includes in its structure a closure member for a fan casing or the like.

Still another object is to provide a motor frame that is adapted to rigidly support the operable parts of the motor and to which an enclosing casing for the motor parts may be readily and detachably secured.

A further object of the invention is to provide in a motor of the above type, a novel arrangement of a motor and motor support wherein means is provided for keeping the motor cool at all times.

To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a perspective front view of a vacuum cleaner embodying the features of this invention;

Fig. 2 is a rear view of the cleaning device;

Fig. 3 is a section on line 33 of Fig. 4;

Fig. 4 is a transverse section through the motor casing of the cleaning device;

Fig. 5 is a section on line 5-5 of Fig. 2;

gig. 6 is a section on line 6-6 of Fig. 5, an

Fig. 7 is a section on line 7-7 of Fig. 5.

The electrical device selected to illustrate the features of my invention is a form of vacuumcleaner having a floor engaging nozzle 10 in communication with a fan casing 11. In this instance, the nozzle'lO and casing 11 are integrally die cast. Communicating with and disposed to one side of the fan casing 11 is a discharge outlet 12, to which a dust bag 13 may be secured to receive the discharged dirt removed from the floor through nozzle 10 b the influence of a suction fan 14, mounte to rotate in fan casing 11. The dust bag 13 is suspended from a handle 15 that is pivoted to the casing 11 and which is used for guiding the cleaner about the floor. A conductor cord 16 of suitable length is provided to supply electrical energy from an electrical outlet to the fan driving motor enclosed in a motor casing 17.

The motor casing 17 is formed of sheet metal, a flat strip of which material is bent into cylindrical form with its ends abutting and retained together by a small plate 18, that is spot-welded to each end. One end of the cylindrical casing 17 is provided with a ring-shaped closure member 19, the outer edge 20 of which telescopes over the casing end and is spot welded thereto. The inner edge of the member 19 is turned inwardly as at 21 and directed toward'the open end of the casing 17. A series of openings 22 is provided in casing 17, the series being spaced from the open end 23 of the casing and the openings equally spaced from each other peripherally about the casing. The open end 23 of casing 17 telescopes over a series of spaced apart lugs 24 disposed in a circular line upon a plate 25 and extending inwardly serves as a part of the improved motor frame 'of this invention. The casing 17 is secured to the plate 25 by screws 26 that thread into the lugs 24.

The motor casing 17 is also provided with an opening 27 through which an operating finger 28 of a switch 29 protrudes, the switch with respect to casing 17. The plate 25 forms 3 a cover for the open end of fan casing 11 and.

that are disposed about its peripheral edge and areadapted to receive screws 34, which are threaded into the end of fan casing 11 to secure plate 25 thereto. A plurality of posts 35 extend outwardly from plate 25 into casing 17. The posts 35 are each provided formed on and disposed about the periphery of field core 39 so as to receive the rods 38, whereby the core 39 will be supported thereon. Sleeves 41 are disposed upon each rod 38 and engage against the core 39. A bearing plate 42, having openings to receive the outer reduced and threaded ends of rods 38 is mounted upon the rods 38, and when secured in place by nuts 38 clamps the field core 39 between the posts 35 and sleeves 41.

- The plate 25 is also provided with an outwardly extending boss 43, that extends into the casing 17 and has a bearing receiving opening 44 therein. A rib 45 disposed upon the outer surface of plate 25 and within casing 17, extends from the boss 43 to the periphery of casing 17 and is provided with an opening 46, communicating with the bearing receiving recess 44. A threaded member 47 is provided to close the outer end of opening 46. The bearing receiving plate 42 is bulged outwardly at 48 to provide a bearing receiving recess 49. Bearing bushings 50 are disposed in recesses 44 and 49 of plates 25 and 42 respectively, being retained therein by resilient disks 51 that are respectively secured to plate 25 by screws 52, and to plate 42 by rivets 53. The bulged portion 48 of plate 42 is disposed within the opening formed by the turned in edge 21 of closure member 19, and

extends out from the casing 17 whereby the bearing disposed therein may be readily lubricated. The turned in edge 21 of member 19 is disposed closely adjacent plate 42 when casing 17 is in assembled position, plate 42 being cut away at 54 to provide ventilation openings at this end of casing 17.

An armature shaft 55 uponwhich an armature 56 is mounted extends from one bearing bushing 50 to the other. The shaft 55 extends beyond one of the bushings 50 and into the fan casing 11 wherein the fan 14 is secured thereto by a set screw 57. A ventilating fan 58 is secured to shaft 55 between the armature 56 ing parts thereof. The fan 58 is so mounted are provided to engage a commutator 59, se-

cured to shaft 55, between armature 56 and the bearing plate 42.

For supporting the cleaner device upon the floor rollers 60 are provided. Two of these rollers are rotatably mounted upon a shaft 61 that is retained beneath casing 17 by a bracket 62 spot-welded to said casing. Each of two other rollers is mounted upon a shaft 63. The shafts 63 are secured to the nozzle 10, in In s 64, disposed one on either side of casing 17.

The sheet metal casing 17 due to its simple structure, may be economically made and is readily removed from and assembled to the cleaner device. The motor frame structure is of few parts and may be economically made and easily assembled to form rigid field core supporting and armature supporting means. The inclusion in the motor frame of a part adapted to form a closure member for the fan casing and upon which certain motor parts are secured, simplifies the manufacture of cleaning devices of this type without sacrificing their efiiciency of operation. The suspension of the motor operating parts from a part which is disposed at an end of an enclosing casing that surrounds these parts and is provided with ventilating openings as de scribed, permits the efficient use of a ventilating fan and proper circulation of air about the parts to cool the same.

While I have shown and described a preferred embodiment of my invention. it will be understood that it is not to be limited to the details shown but is capable of modification .and variation within the spirit of the invention and the scope of the appended claims.

What I claim is: I

1. In a cleaner or like device a closure menr her for the open end of a casing, lugs extending outwardly from the outer surface of said closure member, posts extending outwardly from the outer surface of said closure member, electric motor parts secured to said posts and a casing surrounding said motor parts and secured to said lug s, said lugs being disposed upon the outer surface of said closure member and spaced outwardly radially from said posts to retain said casing spaced axially from said motor parts.

2. In a' cleaner or like device, a closure member for the open end of a casing, lugs extending outwardly from the outer surface of said closure member, posts extending outwardly from the outer surface of said closure member, said posts being spaced radially inwardly from said lugs, rods secured to and extending from said posts, a field core sup- 7 plates being adapted to be secured ported on said rods, means to clamp said field core against said posts, and a cylindrical casing open at one end and disposed over said field core with its open end in abutment with the outer surface of said closure member and secured to the outer sides of said lugs 3. In a cleaner or like device, a closure member for the open end of a casing, electric motor parts secured to the outer surface of said closure member and extending outwardly therefrom, a casing enclosing said motor parts and having an open end thereof secured to said closure member, said motor casing having peripherally spaced apart ventilating openings disposed therein adjacent said closure member and having a centrally disposed opening at its end remote from said closure member, and a fan member disposed between said closure member and said peripherally spaced apart openings in said casing. and being rotatable by said motor to create a draft over and about said motor parts and out of the openings in said caslng.

4. In a cleaner or like device, an open ended motor enclosing casing, a plate memher having lugs thereon spaced inwardly from its periphery and disposed in a circular line, posts extending outwardly from said plate into said motorcasing and disposed in a circular line of lesser diameter and concentric to the circular line upon which said lugs are disposed, said motor casing telescoping over said lugs and abutting against the inner face of said plate, means to secure said motor casing to the outer side of each of said lugs, and electric motor parts secured to the outer ends of said posts.

5. In a cleaner or like device, an electric motor comprising end plates each having a bearing recess, bearing bushings in the recesses of said plates, an armature having a shaft journaled in said bearing bushings, a field core, means extending between said plates by which said field core is supported and to secure said plates together, one of said over the open end of an open ended casing, and a cylindrical casing concentric with said armature shaft and disposed over said field core, said last mentioned casing being secured to said plate and extending beyond and over the other of said plates and turned back into close proximity therewith.

6. In a cleaner or like device, an electric motor having end plates, a shaft hearing In each plate for the armature shaft of said motor, one of said plates having axially directed openings therein, axially extending lugs on the other of said plates, and a cylindrical casing over said motor, one end of said casing telescoping over said lugs and being secured to the outer side thereof, and the other end of said casing extending over the first mentioned plate and having its ends turned back into close proximity therewith.

7. In a cleaner or like device, an electric motor having end plates, a shaft bearing in each plate for the armature shaft of said motor, one of said plates having axially directed openings therein, axially extending lugs on the other of said plates, and a cylindrical casing over said motor, one end of said casing abutting one of said plates and having the other end thereof extending over the other of said plates and being turned back into close proximity therewith.

8. In a cleaner or like device, an electric motor having end plates, a shaft bearing in each plate for the armature shaft of said motor, one of said plates having axially directed openings therein, axially extending lugs on the other of said plates, and a cylindrical casing over said motor, one end of said casing abutting one of said plates and having the other end thereof extending over the other of said plates and being turned back into close proximity therewith, said turned back end of said casing forming an end opening therein by which the axially directed openings in one of said plates are in communication with the atmosphere at the side of said casing.

9. In a cleaner or like device, a plate member adapted to be secured to the open end of a casing, said plate having a series of axially directed posts extending from a face thereof and disposed in a circular line thereto, and also having a series of axially di rected lugs extending from the same face thereof and disposed in a circular line of greater diameter than the circular line in which said posts are disposed, the outer sides of said lugs being adapted to telescope within a cylindrical casing disposed with its open end in abutment with said plate.

ALFRED C. GILBERT. 

